Sigma rule: DiagTrackEoP Default Login Username

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-95c9a0e621f5, updated 2022-08-03T00:00:00.000Z.

Rule

Title: DiagTrackEoP Default Login Username
Status: test
Level: critical
Author: Nasreddine Bencherchali (Nextron Systems)
Date: 2022-08-03
File: rules/windows/builtin/security/account_management/win_security_diagtrack_eop_default_login_username.yml
Commit: ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the default "UserName" used by the DiagTrackEoP POC

Log source

product: windows
service: security

Detection

selection:
    EventID: 4624
    LogonType: 9
    TargetOutboundUserName: 'thisisnotvaliduser'
condition: selection

False positives (as the rule lists them)

Unlikely

References

https://github.com/Wh04m1001/DiagTrackEoP/blob/3a2fc99c9700623eb7dc7d4b5f314fd9ce5ef51f/main.cpp#L46

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/security/account_management/win_security_diagtrack_eop_default_login_username.yml

Sources and licences

SigmaHQ
"DiagTrackEoP Default Login Username" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/security/account_management/win_security_diagtrack_eop_default_login_username.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: DiagTrackEoP Default Login Username",
entity page, dataset version ref-95c9a0e621f5, updated 2022-08-03T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/2111118f-7e46-4fc8-974a-59fd8ec95196 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 2111118f-7e46-4fc8-974a-59fd8ec95196, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.